中文摘要：

通过X射线衍射和扫描电镜，分析高钛渣的物相结构。通过单因素试验，研究原料粒度、硫酸氢铵与钛渣质量比、焙烧温度和焙烧时间对TiO2提取率的影响。正交实验结果表明：各因素对二氧化钛提取率的影响由大到小的顺序为焙烧温度、焙烧时间、硫酸氢铵与钛渣质量比。最佳的试验条件如下：硫酸氢铵与钛渣质量比4：1、焙烧温度480 ℃、焙烧时间60 min、原料粒度45~53 μm。在最佳实验条件下，TiO2的提取率可达到85%。

英文摘要：

By energy-dispersive X-ray and SEM analysis, the phase structural characteristics of high titanium slag were analyzed. Through single factor experiments, the effects of material particle size, mass ratio of ammonium bisulfate to ore, roasting temperature and roasting time on the extracting rate of TiO2 were investigated. The results of orthogonal experiments show that the sequence of each factor affecting the extracting rate of TiO2 is as follows： roasting temperature, roasting time, mass ratio of ammonium bisulfate to high titanium slag. The optimum technological conditions are obtained as mass ratio of ammonium bisulfate to ore of 4：1, roasting temperature of 480 ℃, roasting time of 60 min and material particle size of 45-53 μm. The extracting rate of TiO2 is about 85% under the optimum conditions.